Title page for etd-0907111-112958


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URN etd-0907111-112958
Author Andrea Carolina
Author's Email Address andie529@hotmail.com
Statistics This thesis had been viewed 5583 times. Download 713 times.
Department Marine Biology
Year 2010
Semester 2
Degree Master
Type of Document
Language English
Title The Effect of Bacillus subtilis on Pathogenic Vibrio Control for Grouper (Epinephelus Coioides) Fingerling Culture in a Recirculatory System
Date of Defense 2011-07-28
Page Count 44
Keyword
  • Vibrio
  • Bacillus
  • Closed Recirculatory System
  • microbial processes
  • Abstract Preventing diseases in aquatic animals is of significant economic importance, since small fish have high mortality rates due to high incidences of disease, low water quality among others. Several years ago, the main treatment to protect fishes against different bacterial diseases in hatchery conditions were chemotherapeutic agents (antibiotics) or vaccination. The previous methods may change the profile of a healthy gut microflora, while the vaccination method can be stressful for fish; both methods can enable the access of some pathogens. The use of chemotherapeutic agents can also lead to resistant bacteria, and so their use should be restricted or at least controlled; and so, this study was conducted to investigate the effects of different amounts of probiotics on the water quality parameters in the culture of grouper fingerling (Epinephelus Coioides); species which has become one of the main cultured fish in Taiwan according to FAO. The effects of the probiotic, Bacillus subtilis, on grouper fingerling breeding and water quality was evaluated in this study by adding the probiotic to the feed. Two concentrations of probiotic were administered including 0.1%, 1.0% and the control. During the experiment, fingerling development, growth rate, survival rate and water quality parameters including ammonia-N and nitrite-N, total bacterial count, and presumptive Vibrio count were determined. The presumptive Vibrio count presented was significantly suppressed after Bacillus treatment.
    Advisory Committee
  • C.C. Huang - chair
  • Keryea Soong - co-chair
  • Chen - Chih Kao - advisor
  • Files
  • etd-0907111-112958.pdf
  • Indicate in-campus at 4 year and off-campus access at 4 year.
    Date of Submission 2011-09-07

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